[Kernel-packages] [Bug 1875667] Re: root cannot flock user file in rwt dir if parent gives limited access

This appears to be due to an intentional change in behavior to improve security which I believe was introduced in 19.10. To restore the older behavior, create `/etc/sysctl.d/protect-links.conf` with the contents: fs.protected_regular = 0 Then restart procps: sudo systemctl restart

[Kernel-packages] [Bug 1875667] Re: root cannot flock user file in rwt dir if parent gives limited access

apport information ** Tags added: apport-collected ** Description changed: 1. create folder by root 2. add wt permission flags to all in that folder 3. flock a file by user in that folder - success 4. flock the same file by root - error: Permission denied It is somehow important that

[Kernel-packages] [Bug 1875667] Re: root cannot flock user file in rwt dir if parent gives limited access

test@ubuntu20-04:~$ uname -a Linux ubuntu20-04 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux test@ubuntu20-04:~$ cat /etc/*release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=20.04 DISTRIB_CODENAME=focal DISTRIB_DESCRIPTION="Ubuntu 20.04 LTS" NAME="Ubuntu"